ASTROSAT CZTI

Data Quality Report

Orbit 58251

Creation date: 2026-07-04T14:23:34.361626
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_044T03_9000006588_58251cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58251cztM0_level2_quad_clean.evt
Size (bytes)639,483,84094,075,200
Size609.9 MB 89.7 MB
Events in quadrant A3,065,998679,007
Events in quadrant B7,121,483602,785
Events in quadrant C4,286,509613,062
Events in quadrant D8,687,651494,629

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138522
B0255302
C0174132
D0303272

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6580851.291793%
B6580131219.939210%
C65803545.379939%
D6580148222.522796%

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 7685 6581 3 3 0.04% 0.05%
B 7685 6581 1033 1033 13.44% 15.70%
C 7685 6581 290 290 3.77% 4.41%
D 7685 6581 1482 1482 19.28% 22.52%

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 13 248 48441 251.16 756 736 189.9
A 3 14 26523 135.76 756 736 189.9
A 3 245 18531 93.69 756 736 189.9
B 4 206 3476518 23614.93 687 661 147.2
B 10 128 254423 1724.06 687 661 147.2
B 0 171 208804 1414.12 687 661 147.2
C 12 252 955940 4894.9 705 698 195.2
C 6 223 211486 1080.13 705 698 195.2
C 13 3 168694 860.85 705 698 195.2
D 12 110 4903869 25407.97 674 643 193.0
D 8 160 238009 1230.0 674 643 193.0
D 6 239 163427 843.53 674 643 193.0

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