ASTROSAT CZTI

Data Quality Report

Orbit 57740

Creation date: 2026-05-31T05:22:10.910340
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_57740cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57740cztM0_level2_quad_clean.evt
Size (bytes)508,187,52095,552,640
Size484.6 MB 91.1 MB
Events in quadrant A3,258,228648,502
Events in quadrant B4,638,877668,837
Events in quadrant C6,567,394540,131
Events in quadrant D3,837,017577,469

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01429510
B01838518
C02408422
D0159662

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6569520.791597%
B65682744.171742%
C6569101215.405693%
D6572801.217285%

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 7647 6573 9 9 0.12% 0.14%
B 7647 6571 105 105 1.37% 1.60%
C 7647 6572 969 969 12.67% 14.74%
D 7647 6573 69 69 0.90% 1.05%

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 418144 2394.17 703 684 174.4
A 3 128 55628 315.11 703 684 174.4
A 3 17 31483 176.63 703 684 174.4
B 4 80 1297669 8883.31 685 659 146.0
B 10 16 361773 2473.29 685 659 146.0
B 10 247 71979 488.48 685 659 146.0
C 15 224 3798376 21743.26 636 631 174.7
C 12 249 75740 430.02 636 631 174.7
C 14 254 62784 355.84 636 631 174.7
D 9 49 291335 1495.13 676 643 194.4
D 2 31 251027 1287.81 676 643 194.4
D 3 224 232480 1192.42 676 643 194.4

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