ASTROSAT CZTI

Data Quality Report

Orbit 20181215_A05_225T02_9000002570_level2

Creation date: 2025-11-26T15:08:39.175119
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/AS1A05_225T02_9000002570cztM0_level2.fits modeM0/AS1A05_225T02_9000002570cztM0_level2_quad_clean.evt
Size (bytes)86,924,16065,917,440
Size82.9 MB 62.9 MB
Events in quadrant A558,294386,985
Events in quadrant B526,592376,346
Events in quadrant C537,850354,214
Events in quadrant D460,016327,545

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173500
B0171040
C0168770
D0237840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79141171.478393%
B7914891.124589%
C7914971.225676%
D79144225.332322%

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 9188 7900 0 0 0.00% 0.00%
B 9188 7912 0 0 0.00% 0.00%
C 9188 7913 0 0 0.00% 0.00%
D 9188 7912 0 0 0.00% 0.00%

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 0 29 532 10.61 145 139 37.0
A 7 110 442 8.18 145 139 37.0
A 0 30 427 7.78 145 139 37.0
B 2 9 415 9.38 139 134 29.9
B 5 128 390 8.55 139 134 29.9
B 3 80 359 7.51 139 134 29.9
C 1 80 403 7.05 141 133 38.3
C 1 81 401 7.0 141 133 38.3
C 12 241 386 6.61 141 133 38.3
D 10 189 351 6.55 131 121 35.1
D 7 3 345 6.38 131 121 35.1
D 6 67 328 5.9 131 121 35.1

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