ASTROSAT CZTI

Data Quality Report

Orbit 57825

Creation date: 2026-06-06T00:09:28.151750
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_57825cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57825cztM0_level2_quad_clean.evt
Size (bytes)604,575,36083,234,880
Size576.6 MB 79.4 MB
Events in quadrant A3,511,541605,812
Events in quadrant B4,078,910618,047
Events in quadrant C10,491,657304,542
Events in quadrant D3,798,546543,679

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147301
B0166541
C0356583
D0159231

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64151302.026500%
B64153795.908028%
C6414324950.654818%
D6415881.371785%

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 7325 6416 74 74 1.01% 1.15%
B 7325 6416 256 256 3.49% 3.99%
C 7324 6415 2587 2587 35.32% 40.33%
D 7325 6416 70 70 0.96% 1.09%

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 10 251 321354 1915.7 674 658 167.4
A 3 14 271703 1619.1 674 658 167.4
A 3 245 185366 1103.36 674 658 167.4
B 4 142 752988 5335.18 656 632 141.0
B 5 185 183404 1296.09 656 632 141.0
B 2 249 104792 738.63 656 632 141.0
C 9 38 7423649 54867.07 491 485 135.3
C 15 224 920656 6801.29 491 485 135.3
C 15 208 65351 479.45 491 485 135.3
D 12 110 486285 2665.91 645 617 182.2
D 13 138 195297 1068.63 645 617 182.2
D 8 160 148605 812.33 645 617 182.2

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