ASTROSAT CZTI

Data Quality Report

Orbit 55225

Creation date: 2025-12-13T13:20:57.108651
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_009T01_9000006534_55225cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55225cztM0_level2_quad_clean.evt
Size (bytes)543,844,80094,167,360
Size518.7 MB 89.8 MB
Events in quadrant A3,209,779644,181
Events in quadrant B3,465,965678,671
Events in quadrant C6,235,599526,533
Events in quadrant D6,690,651526,785

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145581
B0154301
C0234591
D0245462

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6815650.953778%
B68161221.789906%
C6816107815.815728%
D681584912.457814%

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 7755 6816 49 49 0.63% 0.72%
B 7756 6816 72 72 0.93% 1.06%
C 7756 6817 988 988 12.74% 14.49%
D 7755 6815 767 767 9.89% 11.25%

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 4 205 132798 744.26 710 692 177.5
A 0 8 127965 717.03 710 692 177.5
A 4 3 73162 408.28 710 692 177.5
B 10 245 192059 1288.72 698 674 148.5
B 5 236 137137 918.89 698 674 148.5
B 10 247 114956 769.53 698 674 148.5
C 13 3 1241892 7068.59 639 633 175.6
C 12 252 1006950 5730.67 639 633 175.6
C 12 254 796104 4529.96 639 633 175.6
D 2 249 1937298 10367.98 658 629 186.8
D 11 129 1369901 7330.41 658 629 186.8
D 5 38 234745 1253.34 658 629 186.8

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