ASTROSAT CZTI

Data Quality Report

Orbit 55121

Creation date: 2025-12-06T01:51:04.933329
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_022T16_9000006532_55121cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55121cztM0_level2_quad_clean.evt
Size (bytes)1,067,273,280207,002,880
Size1017.8 MB 197.4 MB
Events in quadrant A7,159,8421,389,732
Events in quadrant B6,664,2801,483,457
Events in quadrant C8,839,4541,290,398
Events in quadrant D15,669,3341,058,334

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03080
B03080
C03080
D03080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03265919
B0313507
C03724414
D05732124

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A151522601.715945%
B151552281.504454%
C151515143.392515%
D15148267217.639292%

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 16743 15160 60 60 0.36% 0.40%
B 16743 15161 12 12 0.07% 0.08%
C 16742 15158 303 303 1.81% 2.00%
D 16742 15158 2327 2327 13.90% 15.35%

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 0 8 327024 821.88 1608 1568 396.0
A 5 241 206767 518.19 1608 1568 396.0
A 4 78 117868 293.7 1608 1568 396.0
B 0 63 178797 520.24 1584 1523 340.8
B 5 185 65111 186.61 1584 1523 340.8
B 0 182 50574 143.95 1584 1523 340.8
C 6 223 896157 2107.38 1548 1536 424.5
C 13 3 580506 1363.83 1548 1536 424.5
C 14 254 417505 979.86 1548 1536 424.5
D 15 94 6023490 14724.29 1440 1377 409.0
D 11 129 2736470 6687.4 1440 1377 409.0
D 4 221 236803 575.63 1440 1377 409.0

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