ASTROSAT CZTI

Data Quality Report

Orbit 55761

Creation date: 2026-01-18T04:25:07.004319
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_099T04_9000006540_55761cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55761cztM0_level2_quad_clean.evt
Size (bytes)973,457,28075,585,600
Size928.4 MB 72.1 MB
Events in quadrant A14,154,587232,596
Events in quadrant B3,689,955692,114
Events in quadrant C4,194,040616,338
Events in quadrant D13,463,998268,224

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0467787
B0154922
C0169112
D0447312

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6873477369.445657%
B6873911.324022%
C68732032.953586%
D6873403658.722537%

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 7798 6873 4378 4378 56.14% 63.70%
B 7798 6874 25 25 0.32% 0.36%
C 7798 6874 125 125 1.60% 1.82%
D 7797 6872 3919 3919 50.26% 57.03%

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 15 32 11598349 103109.39 448 436 112.5
A 4 249 312781 2776.85 448 436 112.5
A 3 14 254206 2256.1 448 436 112.5
B 7 0 635761 4149.08 710 685 153.1
B 5 172 179940 1171.11 710 685 153.1
B 7 252 25224 160.32 710 685 153.1
C 1 16 681459 3516.25 703 696 193.6
C 9 38 410401 2116.19 703 696 193.6
C 9 237 117175 601.63 703 696 193.6
D 11 129 11037717 79378.53 488 467 139.0
D 8 245 278584 2000.18 488 467 139.0
D 7 70 70787 505.73 488 467 139.0

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