ASTROSAT CZTI

Data Quality Report

Orbit 51873

Creation date: 2025-05-01T09:09:14.209470
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/AS1C09_011T05_9000006466_51873cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51873cztM0_level2_quad_clean.evt
Size (bytes)612,648,00086,169,600
Size584.3 MB 82.2 MB
Events in quadrant A6,246,575553,860
Events in quadrant B4,518,225623,946
Events in quadrant C3,547,572580,123
Events in quadrant D7,886,540419,204

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0229011
B0176721
C0148911
D0277461

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61914797.737038%
B61913756.057180%
C6192831.340439%
D6192152424.612403%

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 7365 6196 327 327 4.44% 5.28%
B 7365 6196 259 259 3.52% 4.18%
C 7366 6197 79 79 1.07% 1.27%
D 7366 6197 1447 1447 19.64% 23.35%

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 12 3 2008579 12943.14 621 607 155.1
A 12 80 359239 2311.7 621 607 155.1
A 15 174 287073 1846.52 621 607 155.1
B 4 170 653905 4921.13 627 606 132.8
B 4 81 394820 2969.51 627 606 132.8
B 5 172 258849 1945.28 627 606 132.8
C 13 3 319212 1852.0 622 616 172.0
C 10 22 301385 1748.37 622 616 172.0
C 15 189 112229 648.81 622 616 172.0
D 11 129 4592201 31158.2 521 502 147.4
D 8 176 569319 3859.86 521 502 147.4
D 3 12 151776 1026.51 521 502 147.4

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