ASTROSAT CZTI

Data Quality Report

Orbit 57242

Creation date: 2026-04-30T19:47:45.887002
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_070T08_9000006568_57242cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57242cztM0_level2_quad_clean.evt
Size (bytes)1,361,157,120262,805,760
Size1.3 GB 250.6 MB
Events in quadrant A9,309,7351,762,951
Events in quadrant B8,890,8401,885,091
Events in quadrant C20,734,3761,387,673
Events in quadrant D9,951,9431,588,252

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03900
B03900
C03900
D03900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0423482
B0409372
C0752482
D0429752

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A193484752.455034%
B193485332.754807%
C19349405820.972660%
D193494452.299860%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 20408 19349 80 80 0.39% 0.41%
B 20408 19348 58 58 0.28% 0.30%
C 20409 19349 3003 3003 14.71% 15.52%
D 20409 19350 124 124 0.61% 0.64%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 7 64 1203583 2372.85 2056 2006 506.4
A 10 251 58358 111.28 2056 2006 506.4
A 4 13 33109 61.42 2056 2006 506.4
B 7 252 163357 373.0 2023 1942 432.8
B 0 245 153510 350.24 2023 1942 432.8
B 10 247 150641 343.61 2023 1942 432.8
C 15 224 10014395 20318.19 1828 1807 492.8
C 12 254 2917274 5916.25 1828 1807 492.8
C 12 252 283293 571.21 1828 1807 492.8
D 2 172 572437 1020.44 1995 1906 559.1
D 7 96 417481 743.29 1995 1906 559.1
D 8 240 206076 365.17 1995 1906 559.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter