ASTROSAT CZTI

Data Quality Report

Orbit 56269

Creation date: 2026-02-23T22:00:15.904680
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_049T01_9000006552_56269cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56269cztM0_level2_quad_clean.evt
Size (bytes)1,763,265,600156,686,400
Size1.6 GB 149.4 MB
Events in quadrant A25,845,976657,185
Events in quadrant B8,431,3901,311,073
Events in quadrant C16,615,082867,228
Events in quadrant D13,331,846969,023

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02780
B02780
C02780
D02780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0861853
B0344643
C0588033
D0493473

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13582699351.487263%
B135835874.321578%
C13583385728.395789%
D13583194414.312008%

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 15302 13582 6513 6513 42.56% 47.95%
B 15303 13586 340 340 2.22% 2.50%
C 15303 13584 3187 3187 20.83% 23.46%
D 15303 13586 1771 1771 11.57% 13.04%

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 15 32 9589485 34789.69 1108 1083 275.6
A 8 176 6980969 25325.19 1108 1083 275.6
A 4 95 2552713 9258.1 1108 1083 275.6
B 0 231 774036 2554.39 1416 1363 302.5
B 5 185 501719 1654.13 1416 1363 302.5
B 4 171 337183 1110.19 1416 1363 302.5
C 15 230 8254258 25397.74 1185 1172 325.0
C 12 254 3228263 9930.93 1185 1172 325.0
C 5 250 175609 536.81 1185 1172 325.0
D 8 129 5769042 15321.39 1318 1254 376.5
D 2 249 987188 2619.01 1318 1254 376.5
D 2 120 377087 998.35 1318 1254 376.5

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