ASTROSAT CZTI

Data Quality Report

Orbit 55871

Creation date: 2026-01-25T14:30:07.339334
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_030T02_9000006544_55871cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55871cztM0_level2_quad_clean.evt
Size (bytes)754,441,920102,346,560
Size719.5 MB 97.6 MB
Events in quadrant A8,118,141638,318
Events in quadrant B4,645,003698,610
Events in quadrant C5,176,894651,964
Events in quadrant D9,374,332560,175

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0295901
B0199341
C0212701
D0333261

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7907127916.175541%
B790691711.598786%
C79067449.410574%
D7906138417.505692%

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 7907 7907 1190 1190 15.05% 15.05%
B 7906 7906 288 288 3.64% 3.64%
C 7906 7906 370 370 4.68% 4.68%
D 7906 7906 1252 1252 15.84% 15.84%

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 12 115 4005627 20010.45 819 795 200.1
A 7 64 297907 1484.54 819 795 200.1
A 8 249 227720 1133.85 819 795 200.1
B 5 172 1294943 7496.49 800 768 172.6
B 4 21 45565 259.48 800 768 172.6
B 7 252 33374 188.87 800 768 172.6
C 15 199 1307456 6049.6 797 788 216.0
C 12 252 240640 1110.46 797 788 216.0
C 6 223 158448 729.93 797 788 216.0
D 2 62 4655145 21472.88 773 739 216.8
D 15 125 1022538 4714.02 773 739 216.8
D 11 129 224066 1030.31 773 739 216.8

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