ASTROSAT CZTI

Data Quality Report

Orbit 52462

Creation date: 2025-06-27T19:33:48.083922
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/AS1A13_037T01_9000006476_52462cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52462cztM0_level2_quad_clean.evt
Size (bytes)1,411,799,040137,825,280
Size1.3 GB 131.4 MB
Events in quadrant A7,760,0171,114,828
Events in quadrant B6,679,9021,217,772
Events in quadrant C11,256,315979,807
Events in quadrant D25,600,1082,079

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D0103

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0337392326
B0308322438
C0460834122
D0940159577

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027322
B027323
C027626
D027323

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A125346044.818893%
B125022171.735722%
C12398140311.316341%
D122021218599.860679%

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 20013 12739 529 529 2.64% 4.15%
B 20017 12686 110 110 0.55% 0.87%
C 20010 12605 1252 1252 6.26% 9.93%
D 20000 12385 6984 6984 34.92% 56.39%

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 61 1162404 3536.54 1324 1292 328.3
A 13 248 493432 1498.97 1324 1292 328.3
A 8 249 218176 660.59 1324 1292 328.3
B 4 171 371540 1311.92 1324 1275 282.2
B 4 81 221539 780.44 1324 1275 282.2
B 0 213 216821 763.72 1324 1275 282.2
C 12 254 1620764 4783.93 1230 1220 338.5
C 2 12 1382159 4079.12 1230 1220 338.5
C 4 5 1316339 3884.7 1230 1220 338.5
D 15 93 23607568 567374.25 136 129 41.6
D 6 42 978662 23517.77 136 129 41.6
D 15 78 154243 3703.93 136 129 41.6

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