ASTROSAT CZTI

Data Quality Report

Orbit 57877

Creation date: 2026-06-09T10:53:34.195254
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_125T11_9000006582_57877cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57877cztM0_level2_quad_clean.evt
Size (bytes)463,613,760112,832,640
Size442.1 MB 107.6 MB
Events in quadrant A3,367,526750,233
Events in quadrant B3,808,709792,492
Events in quadrant C5,488,577656,154
Events in quadrant D3,878,990666,063

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163441
B0172461
C0220661
D0172941

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7935760.957782%
B79362503.150202%
C79367289.173387%
D79361051.323085%

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 8480 7937 0 0 0.00% 0.00%
B 8481 7938 39 39 0.46% 0.49%
C 8481 7938 457 457 5.39% 5.76%
D 8481 7938 52 52 0.61% 0.66%

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 25142 114.7 861 838 211.9
A 3 137 10670 46.4 861 838 211.9
A 13 254 8274 35.09 861 838 211.9
B 7 252 122008 669.22 849 816 181.1
B 5 185 93676 512.77 849 816 181.1
B 10 247 52731 286.67 849 816 181.1
C 15 224 1471929 6834.73 800 790 215.2
C 6 223 244004 1129.94 800 790 215.2
C 12 252 214257 991.74 800 790 215.2
D 3 12 224528 976.77 830 792 229.1
D 12 110 145124 630.11 830 792 229.1
D 2 31 91351 395.35 830 792 229.1

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