ASTROSAT CZTI

Data Quality Report

Orbit 51770

Creation date: 2025-04-24T10:21:50.121848
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_090T01_9000006464_51770cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51770cztM0_level2_quad_clean.evt
Size (bytes)693,201,60088,404,480
Size661.1 MB 84.3 MB
Events in quadrant A4,787,179604,751
Events in quadrant B4,842,141668,346
Events in quadrant C5,925,252562,137
Events in quadrant D9,605,271391,443

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186102
B0187642
C0218352
D0330102

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64574376.767849%
B64573966.132879%
C645778612.172836%
D6457242237.509679%

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 7580 6451 302 302 3.98% 4.68%
B 7580 6451 218 218 2.88% 3.38%
C 7580 6449 633 633 8.35% 9.82%
D 7579 6450 1996 1996 26.34% 30.95%

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 11 3 598664 3475.39 696 681 172.1
A 2 143 464079 2693.21 696 681 172.1
A 13 248 273614 1586.25 696 681 172.1
B 4 206 1383859 9294.46 699 675 148.8
B 9 223 116988 781.58 699 675 148.8
B 1 239 102200 682.21 699 675 148.8
C 1 243 1173662 6431.64 669 666 182.4
C 15 232 626048 3429.03 669 666 182.4
C 15 218 491647 2692.09 669 666 182.4
D 11 129 6908439 44020.8 560 542 156.9
D 8 176 162904 1034.66 560 542 156.9
D 10 181 107519 681.71 560 542 156.9

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