ASTROSAT CZTI

Data Quality Report

Orbit 00549

Creation date: 2026-03-07T11:37:29.138832
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/AS1P01_044T01_9000000072_00549cztM0_level2.fits modeM0/AS1P01_044T01_9000000072_00549cztM0_level2_quad_clean.evt
Size (bytes)572,947,20071,519,040
Size546.4 MB 68.2 MB
Events in quadrant A5,263,715479,527
Events in quadrant B5,194,210498,066
Events in quadrant C5,016,753467,293
Events in quadrant D5,416,558428,632

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185611
B0183471
C0178221
D0190541

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0860
C0860
D0860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A414620.048239%
B414630.072359%
C4146410.988905%
D4146651.567776%

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 4146 4146 118 118 2.85% 2.85%
B 4146 4146 79 79 1.91% 1.91%
C 4146 4146 136 136 3.28% 3.28%
D 4146 4146 194 194 4.68% 4.68%

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 0 238 72670 243.46 1334 1318 293.1
A 14 79 15920 49.82 1334 1318 293.1
A 13 160 12305 37.49 1334 1318 293.1
B 0 220 27686 84.77 1322 1330 310.9
B 4 206 23702 71.96 1322 1330 310.9
B 5 249 23036 69.81 1322 1330 310.9
C 3 159 314513 933.37 1191 1234 335.6
C 15 241 12761 34.34 1191 1234 335.6
C 10 38 12571 33.78 1191 1234 335.6
D 1 4 413185 1146.3 1166 1213 359.4
D 13 221 141926 391.53 1166 1213 359.4
D 1 5 122502 337.48 1166 1213 359.4

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