ASTROSAT CZTI

Data Quality Report

Orbit 57742

Creation date: 2026-05-31T09:07:34.328642
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_083T16_9000006580_57742cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57742cztM0_level2_quad_clean.evt
Size (bytes)896,935,680176,356,800
Size855.4 MB 168.2 MB
Events in quadrant A6,251,3541,188,393
Events in quadrant B8,688,8291,259,884
Events in quadrant C10,679,3301,023,891
Events in quadrant D6,663,1141,046,631

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02400
B02400
C02400
D02400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0267323
B0340273
C0399893
D0283173

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0260
C0260
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A118761050.884136%
B118763993.359717%
C11876146912.369485%
D118762652.231391%

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 14255 11876 34 34 0.24% 0.29%
B 14256 11876 104 104 0.73% 0.88%
C 14255 11876 1458 1458 10.23% 12.28%
D 14255 11877 205 205 1.44% 1.73%

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 7 160 1046434 3314.36 1279 1246 315.4
A 3 128 119786 375.9 1279 1246 315.4
A 3 245 46943 144.91 1279 1246 315.4
B 4 80 2673445 10098.36 1261 1212 264.6
B 10 16 221812 833.65 1261 1212 264.6
B 4 142 154383 578.83 1261 1212 264.6
C 15 224 4878050 15086.98 1189 1176 323.3
C 12 2 552895 1706.78 1189 1176 323.3
C 12 249 176724 543.07 1189 1176 323.3
D 3 224 1003471 2882.16 1231 1175 347.8
D 2 249 141157 402.53 1231 1175 347.8
D 5 32 140789 401.47 1231 1175 347.8

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