ASTROSAT CZTI

Data Quality Report

Orbit 55870

Creation date: 2026-01-25T14:15:38.264350
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_55870cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55870cztM0_level2_quad_clean.evt
Size (bytes)806,074,56087,145,920
Size768.7 MB 83.1 MB
Events in quadrant A13,312,944342,552
Events in quadrant B3,375,960714,519
Events in quadrant C6,152,985548,405
Events in quadrant D6,437,611530,653

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0445362
B0156702
C0235572
D0245252

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7208384853.385128%
B72081261.748058%
C7208114815.926748%
D720893913.027192%

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 9068 7210 3840 3840 42.35% 53.26%
B 9068 7210 21 21 0.23% 0.29%
C 9068 7210 820 820 9.04% 11.37%
D 9068 7210 908 908 10.01% 12.59%

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 10296310 68065.58 615 598 151.3
A 7 64 336373 2219.83 615 598 151.3
A 12 194 81922 537.64 615 598 151.3
B 5 172 163304 1014.19 746 717 160.3
B 7 252 148279 920.47 746 717 160.3
B 0 199 28490 173.24 746 717 160.3
C 15 199 2650253 14463.54 670 662 183.2
C 13 3 208121 1132.47 670 662 183.2
C 12 252 195923 1065.89 670 662 183.2
D 2 62 2314451 11893.69 684 652 194.5
D 15 125 517735 2657.98 684 652 194.5
D 2 249 232045 1189.44 684 652 194.5

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