ASTROSAT CZTI

Data Quality Report

Orbit 56261

Creation date: 2026-02-22T21:30:05.083937
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_049T01_9000006552_56261cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56261cztM0_level2_quad_clean.evt
Size (bytes)822,349,44077,771,520
Size784.3 MB 74.2 MB
Events in quadrant A14,868,742165,211
Events in quadrant B3,878,175680,579
Events in quadrant C6,938,980482,528
Events in quadrant D4,251,243573,401

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0486091
B0158061
C0250221
D0169241

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6494503477.517709%
B64942744.219279%
C6495176227.128560%
D64952083.202463%

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 7533 6493 4776 4776 63.40% 73.56%
B 7534 6495 47 47 0.62% 0.72%
C 7535 6496 917 917 12.17% 14.12%
D 7535 6496 120 120 1.59% 1.85%

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 12 115 6205901 56907.57 430 419 109.0
A 8 176 3910084 35853.71 430 419 109.0
A 15 32 2312152 21199.82 430 419 109.0
B 5 185 332620 2194.11 716 690 151.3
B 0 63 186345 1227.21 716 690 151.3
B 4 21 90067 590.8 716 690 151.3
C 15 230 3638788 21083.45 627 620 172.6
C 12 254 364059 2106.16 627 620 172.6
C 9 237 130288 751.44 627 620 172.6
D 8 129 643107 3247.01 704 672 197.9
D 2 249 318901 1608.4 704 672 197.9
D 2 31 187071 942.1 704 672 197.9

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