ASTROSAT CZTI

Data Quality Report

Orbit 52977

Creation date: 2025-07-15T09:59:32.507250
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/AS1A13_003T01_9000006486_52977cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52977cztM0_level2_quad_clean.evt
Size (bytes)986,365,44064,661,760
Size940.7 MB 61.7 MB
Events in quadrant A14,182,66754,746
Events in quadrant B2,767,460629,853
Events in quadrant C8,972,658444,355
Events in quadrant D10,133,701411,907

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460580
B0124300
C0307380
D0342260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58985898100.000000%
B58981021.729400%
C5898225938.301119%
D5898229238.860631%

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 7028 5899 5412 5412 77.01% 91.74%
B 7028 5899 12 12 0.17% 0.20%
C 7028 5899 2015 2015 28.67% 34.16%
D 7028 5899 2300 2300 32.73% 38.99%

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 9 191 13770710 662552.84 76 74 20.8
A 0 8 46609 2238.96 76 74 20.8
A 7 206 27666 1327.55 76 74 20.8
B 4 81 36367 261.92 636 614 136.5
B 0 143 35236 253.63 636 614 136.5
B 5 185 27241 195.06 636 614 136.5
C 7 80 2679746 19580.24 500 495 136.8
C 12 254 2154552 15742.07 500 495 136.8
C 15 215 758117 5536.78 500 495 136.8
D 8 176 4247342 29683.79 497 473 143.1
D 2 62 2042184 14270.68 497 473 143.1
D 2 172 460274 3213.81 497 473 143.1

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