ASTROSAT CZTI

Data Quality Report

Orbit 57274

Creation date: 2026-04-29T21:27:46.423622
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_049T03_9000006570_57274cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57274cztM0_level2_quad_clean.evt
Size (bytes)532,869,12090,800,640
Size508.2 MB 86.6 MB
Events in quadrant A7,165,108507,587
Events in quadrant B3,397,446663,171
Events in quadrant C5,253,397558,892
Events in quadrant D3,400,248562,685

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02575640
B01475936
C02021545
D01477518

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6551152423.263624%
B65431502.292526%
C65505468.335878%
D6552751.144689%

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 7552 6561 1079 1079 14.29% 16.45%
B 7552 6554 89 89 1.18% 1.36%
C 7552 6562 456 456 6.04% 6.95%
D 7552 6559 50 50 0.66% 0.76%

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 3 95 4339739 28389.61 618 601 152.8
A 8 4 314075 2050.96 618 601 152.8
A 3 14 86910 564.69 618 601 152.8
B 10 16 292090 1953.66 686 661 149.2
B 10 247 120154 801.05 686 661 149.2
B 0 199 72956 484.64 686 661 149.2
C 15 224 2441929 13709.38 650 643 178.1
C 14 254 86956 484.7 650 643 178.1
C 14 67 81560 454.4 650 643 178.1
D 8 240 221947 1149.12 680 648 192.6
D 2 249 155433 803.74 680 648 192.6
D 7 96 95964 494.94 680 648 192.6

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