ASTROSAT CZTI

Data Quality Report

Orbit 55877

Creation date: 2026-01-25T23:05:47.866034
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_030T02_9000006544_55877cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55877cztM0_level2_quad_clean.evt
Size (bytes)617,535,36088,758,720
Size588.9 MB 84.6 MB
Events in quadrant A3,710,537640,941
Events in quadrant B3,283,776686,554
Events in quadrant C3,086,953605,957
Events in quadrant D12,240,154272,437

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157711
B0149381
C0147191
D0410814

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6909901.302649%
B69101031.490593%
C6910761.099855%
D6909395457.229700%

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 7709 6910 44 44 0.57% 0.64%
B 7710 6911 49 49 0.64% 0.71%
C 7710 6911 35 35 0.45% 0.51%
D 7709 6907 3054 3054 39.62% 44.22%

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 4 249 261414 1455.95 720 700 179.1
A 15 32 170667 949.18 720 700 179.1
A 8 192 144885 805.2 720 700 179.1
B 0 153 198800 1305.97 707 681 151.7
B 5 185 134170 879.94 707 681 151.7
B 0 199 47284 307.2 707 681 151.7
C 12 254 171518 888.2 698 690 192.3
C 15 199 126419 653.71 698 690 192.3
C 15 131 25039 126.6 698 690 192.3
D 11 129 9444866 73153.92 452 431 129.1
D 15 125 382751 2961.34 452 431 129.1
D 8 245 201428 1556.87 452 431 129.1

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