ASTROSAT CZTI

Data Quality Report

Orbit 55539

Creation date: 2026-01-03T10:47:59.922917
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_021T06_9000006538_55539cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55539cztM0_level2_quad_clean.evt
Size (bytes)501,984,00094,887,360
Size478.7 MB 90.5 MB
Events in quadrant A3,644,555636,786
Events in quadrant B3,376,377674,658
Events in quadrant C5,491,601546,162
Events in quadrant D5,539,878540,667

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160420
B0151858
C0210410
D0213050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68121492.187317%
B68081361.997650%
C681277711.406342%
D68125748.426307%

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 6812 6812 100 100 1.47% 1.47%
B 6812 6809 94 94 1.38% 1.38%
C 6812 6812 639 639 9.38% 9.38%
D 6812 6812 479 479 7.03% 7.03%

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 4 159 591229 3389.14 699 682 174.2
A 7 14 98307 560.27 699 682 174.2
A 4 3 68407 388.67 699 682 174.2
B 4 206 276790 1842.3 693 667 149.9
B 0 171 123913 822.3 693 667 149.9
B 5 236 84174 557.16 693 667 149.9
C 15 148 2143788 11978.59 651 642 178.9
C 9 38 349322 1948.86 651 642 178.9
C 13 3 111238 618.15 651 642 178.9
D 11 129 1570777 8299.94 661 633 189.2
D 2 249 526725 2780.98 661 633 189.2
D 2 120 263063 1387.23 661 633 189.2

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