1. HXMT in IHEP progresses since last joint calibration meeting
Shu Zhang

2. Outline
Calibration
Background model
Research progresses
New targets

3. Calibration Timing system
TOA analyses of Crab show timing precisions are < 100 us.

4. Calibration EC relationship: HE 4 lines in background,
ME 1 line in background
LE a few line in Cas A spectrum

5. Calibration
ARF, strategy pulse on-off, independent of background model
Input:
Pulse-on energy spectrum
Proper method to revise the ARF.
Progress:
Pulse-on spectrum from RXTE data;
Take polynomial in xspec to fit the spectrum, fix the pulse-on spectral parameters.

6. Verification of the calibration
ARF:
1 use the Crab pulse-on spectrum from Bepposax and Nustar as input for cross check
2 Crab nebula spectrum with 1th version of background and total systematic error?
3 test with pulse-on spectrum of other pulsar in outburst of HXMB systems.
4 stability of the revised ARF, by investigating the Crab pulse-on or nebular spectrum over different time spans.
5 ME ARF revision dependence of the source flux level?
EC:
1 LE : Cas A spectrum fitting and other source with line emissions
2 ME : silver line 3 HE: fitting the lines in the background spectrum?
EC precisions have influences of measuring lines at soft X-rays and CRSF at hard X-rays. May also have influence on the continuum spectral analysis.
Version 1 of calibration on the response matrix?
Total systematic error ?

7. Background model Strategy:
consider the relation between blind detector and the other detectors.
Input:
blank sky observation;
Proper EC to account properly for the line emission in the background spectrum
Proper data selection criteria

8. Background model Test and verification, Input: The other blank sky
ME BKG model uncertainty: ME efficiency evolving?
Systematic error in background model?
Version 1 background model will be released and packed into HXMT data analysis software.

9. Research progresses
Paper on the new transient MAXI JJ almost ready for reporting the QPO and time lag (HuangYue).
Research on the CRSF: obtained good spectral fits with the updated ARF to the source of Her X-1 (Ge MingYu)
Paper on the new transient Swift J : timing and pulse profile evolution (Ge MingYu).

10. Spin profile evolution of Swift J0243.6+614HE LE

11. Her X-1 CRSF
Her X-1 3th observation

12. New targets
After last December, the following targets that not observed previously by HXMT came into FOV:
Swift J : 430 ks (outburst of newly discovered HMXB)
MAXI J : ks (the new X-ray nova and black hole candidate)
Aql X-1: 30ks (outburst decay)
NGC 6624 : 30ks (globular star cluster, atoll source 4U  : spin, type-I burst, orbit 685 s , with –P_dot, 171 days period)